X-ray pole figure analysis of apatite crystals and collagen molecules in bone
X-ray pole figure analysis of apatite crystals and collagen molecules in bone
复制标题
DOI：
10.1007/s002239900244
复制
发表时间：
1997-04-01
影响因子：
4.2
通讯作者：
Sudoh, Y
中科院分区：
文献类型：
--
作者：
Sasaki, N;Sudoh, Y
对骨矿物质中的磷灰石（AP）晶体和骨基质中的胶原分子进行X射线极图分析。对于骨矿物质中的AP，检查（0002）平面（c轴）和{21（3）over bar 0}平面。来自两个平面的衍射峰与骨中的其他衍射峰很好地分离。为了研究骨基质中胶原分子的取向，使用EDTA处理的脱矿骨。对于胶原，研究了从大约0.3 nm周期沿着胶原分子的螺旋轴的衍射峰。AP的c轴和胶原分子的螺旋轴在平行于骨轴的方向上具有强烈的优选取向。AP的c轴在骨的径向和切向方向上具有明显的极密度峰，而胶原分子在骨轴方向上几乎是单轴取向的，尽管具有明显的分布。这表明骨矿物质中AP颗粒中存在两种以上的形态：一种是c轴几乎平行于骨轴，另一种是c轴几乎垂直于骨轴。{21（3）over bar 0}平面在径向和切向方向上的极图中具有孤立的极密度峰。在对细长聚乙烯的取向分类的基础上，得出骨中AP颗粒的主要部分是双轴取向的结论。
X-ray pole figure analysis was performed on apatite (AP) crystals in bone mineral and collagen molecules in the bone matrix. For AP in bone mineral, the (0002) plane (c-axis) and {21 (3) over bar 0} plane were examined. The diffraction peaks from both planes were well isolated from other diffraction peaks in the bone. To investigate the orientation of collagen molecules in the bone matrix, demineralized bone by EDTA treatment was used. For collagen, the diffraction peak from about the 0.3 nm period along the helix axis of the collagen molecule was investigated. The c-axis of AP and the helical axis of the collagen molecule have strongly preferred orientations in a direction parallel to the bone axis. The c-axis of AP has an appreciable pole density peak in the radial and tangential direction of the bone, whereas collagen molecules were almost uniaxially oriented in the bone axis direction though having an appreciable distribution. This suggests that there are more than two types of morphology in the AP particle in bone mineral: one with the c-axis almost parallel to the bone axis and the other in which the c-axis is oriented almost perpendicular to the bone axis. The {21 (3) over bar 0} plane has isolated peaks of pole density in pole figures in both radial and tangential directions. On the basis of the classification of orientation for elongated polyethylene, the main portion of AP particles in bone is concluded to be biaxially oriented.